One note, lol, for the Oregano, be prepared, it is a HOT oil!!!! I highly recommend putting it in a capsule instead of in water. Also if you use it topically, make sure to use a high dilution of a carrier oil! :D
For all oils, put them in a 2%-6% dilution ratio for adults, and for kids, a 1% dilution ratio. Use a good quality carrier oil like coconut oil!
I haven't had a sore throat in a long time, but if I ever even start to feel a tingling, I just drop one drop of On Guard on my tongue and then apply it topically, and by the next morning, it is gone.
Another great option, put the On Guard or Lemon in honey instead and take that or put the honey in warm water to make tea!